Altitude of a Triangle: a perpendicula segment from a vertex to a line containing the base of a triangle.
Height of a Triangle: the length of the altitude.
Base of a Triangle: any side of a triangle.
Area of a triangle- A=1/2bh

Base of a Parallelogram: any side of a parallelogram.
Altitude of a Parallelogram: a perpendicular segment from a line containing the base to a line containing the side opposite the base.
Height of the Parallelogram: the length of the altitude.
Area of a parallelogram: A=bh

Bases of a Trapezoid: two parallel sides of a trapezoid.
Area of a trapezoid: A=1/2(b1+b2)h

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Height of a Trapezoid: the length of an altitude
Altitude of a Trapezoid: a perpendicular segment from a line containing one base to a line containing the other base


Parts of a Parallelogram: Any side of a parallelogram can be called the base of the parallelogram. An altitude of a parallelogram is a perpendicular segment from a line containing the base to a line containing the side opposite the base. The height of the parallelogram is the length of the altitude.

Parts of a Triangle: any side of a triangle can be called the base of the triangle. The altitude of the tringle is a perpendicular segment from a vertex to a line containing the base of the triangle. The height of the triangle is the length of the altitude.

Parts of a trapozoid: the two parallel sides of a trapizoid are known as the bases of the trapizoid.
Legs of the trapizoid: the two non-parallel sides
Altitude of a trapizoid
: is a perpendicular segment from a line containing one base to a line is the length of an altitude.